COMPOSITAE NEW AND TRANSFERRED. 517 
4 mm. lati. Corollae disci flavae in basi tubi ampliata etiam basi 
faucium puberulae 5.5 mm. longae (tubo 1.2 mm.). Paleae supra 
purpurascentes et strigillosae apice abrupte acuminatae 6.8 mm. 
longae. Achaenia glabra substriata oblonga 3 mm. longa 1 mm. lata. 
Pappus nullus.— Jatisco: mountains above Etzatlan, 2 Oct. 1903, 
Pringle 11537 (ryPE couL.: Kew).— Distributed as G. Ghiesbreghtir 
Hemsl., but that has mainly opposite leaves whitened beneath with a 
dense strigillosity. 
Haplocalymma Blake, n. genus H elianth.-V erbesin., Hymenostephio 
Benth. proximum, a quo involucro uniseriato 5-phyllo et foliis alternis 
imprimis differt.— Capitula heterogama radiata, floribus radii neutris 
disci hermaphroditis fertilibus. Involucri subcampanulati bracteae 
5 uniseriatae oblongo-lanceolatae acuminatae adpressae apice paul- 
lum patentes subherbaceae intus subinduratae 3-5-nerviae dense 
strigosae flores radii subtendentes. Receptaculum parvulum con- 
vexiusculum, paleis complicatis flores disci amplectentibus onus- 
tum. Corollae radii 5 ligulatae flavae parvae ovales ca. 6-nerviae 
emarginatae; disci ca. 16 regulares flavae puberulae tubo brevissimo 
faucibus cylindricis apice 5-fidae. Antherae basi subauriculatae apice 
appendice deltoideo-ovata flava munitae. Styli rami obtusiusculi 
hirti non appendiculati. Achaenia radii abortiva; disci parva ob- 
longa a latere subcompressa subsparse villosa. Pappus e squamellis 
6 hyalinis latis profunde laceratis duabus in angulis achaenii paullo 
longioribus compositus.— Herba ramosa tenuis strigillosa, capitula 
numerosa parvula in paniculis cymosis subdensis 3-5-cephalis ramos 
dichotome ramosos terminantibus gerens. Folia (saltem media et 
superiora) alterna ovata grosse sinuato-dentata dentibus acutissime 
mucronatis.— Species unica Viguiera microcephala Greenm. 
Haptocatymma microcephalum (Greenm.) Blake, n. comb. — 
Viguiera microcephala Greenm.! Proc. Am. Acad. xxxix. 105 (1903).— 
More os: limestone hills near Yautepec, 7 Nov. 1902, Pringle 8717 
(tyPE cout.: Brit. Mus., Kew); near Cuernavaca, 1905, Lemmon 85 
ew). 
The genus Haplocalymma (amois, simple, and xadvppa, covering, 
rom the uniseriate involucre) differs from its near ally Hymeno- 
stephium Benth. of southern Mexico, Central America and Colombia 
in its strictly uniseriate 5-leaved involucre (of 2-3 series in Hymeno- 
stephium) and its alternate leaves, but in pappus characters agrees 
perfectly with Hymenostephium angustifolium Benth. From Viguiera, 
to which its relationship is rather less close, it may be distinguished by 
the character of its pappus and involucre. The group of Viguwera 
